Endocarditis of a prosthetic valve is a known but rare occurrence. Fungal endocarditis is extremely rare. However, in the COVID-19 pandemic, there has been increasing recognition of fungal or yeast-related infections, often due to the combination of immune paresis, concurrent use of corticosteroids or underlying chronic conditions such as diabetes or neoplasms. We present a patient with fulminating, invasive aspergillosis of a prosthetic aortic valve who presented with catastrophic cardiovascular failure needing intensive care management. Early recognition and prompt therapy is the cornerstone of success in such presentations with high mortality.